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SERVICE AND ADJUST ENT$
TO ADJUST CARBURETOR (See Fig. 32)
The carburetor has been preset at the factory and adjust-
ment should not be necessary,_ However, minor adjust-
ment may be required tocompensate for differences infuel,
temperature, altitude or load, If the carburetor does need
adjustment, proceed as follows:
tn general, turning idle mixture valve in (clockwise) de-
creases the supply of fuel to the engine giving a leaner fuel/
air mixture. Turning the idle mixture valve out (counter-
clockwise) increases the supply of fuel to the engine giving
a richer fue!/air mixture.,
IMPORTANT: DAMAGE TO THE NEEDLE VALVE AND
THE SEAT IN CARBURETOR MAY RESULT tF SCREW IS
TURNED IN TOO TIGHT
PRELIMINARY SE-I-FING -
= Air cleaner assembly must be assembled to the carbu-
retor when making carburetor adjustments.,
. Be sure the throttle control cable is adjusted properly
(see above).
• With engine off turn idle mixt[Jre valve in (clockwise)
closing it finger tight and then turn out (counterclock-
wise) 1 full turn.,
FINAL SETTING
• Start engine and allow to warm for five minutes. Make
final adjustments with engine running and shift/motion
control lever in neutral (N) position
. Move throttle control lever to slow (._) position, With
finger, rotate and hold throttle lever against idle speed
screw° Turn idle speed screw to attain 1750 RPM.,
. While still holding throttle lever against idle speed
screw, turn idle mixture valve in (clockwise) until en-
gine begins to die and then turn out (counterclockwise)
until engine runs rough. Turn valve to a point midway
between those two positions,, Release throttle lever,,
ACCELERATION TEST -
• Move throttle control lever from slow (,_) to fast (4)
position. If engine hesitates or dies, turn idle mixture
valve out (counterclockwise) 1/8 turn. Repeat test and
continue to adjust, if necessary, until engine acceler_
ates smoothly.
High speed stop is factory' adjusted. Do not adjust -
damage may result.,
IMPORTANT: NEVER TAMPER WITH THE ENGINE
GOVERNOR, WHICH IS FACTORY SET FOR PROPER
ENGINE SPEED. OVERSPEEDING THE ENGINI_ABOVE
THE FACTORY HiGH SPEED SETTING CAN BE
DANGEROUS, IF YOU THINK THE ENGINE-GOVERNED
HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR
NEAREST AUTHORIZED SERVICE CENTER/
DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND
EXPERIENCE TO MAKE ANY NECESSARY
ADJUSTMENTS.
I
THROTTLE IDLE SPEED
LEVER SCREW
IDLE MIXTURE
VALVE
FIG. 32
25